Node.js

Node.js is a cross-platform JavaScript runtime environment. Node.js 22 (LTS 2025) brings native TypeScript support (experimental), a built-in Test Runner, and a native WebSocket client.

When to Use

• Real-time Apps: Chat, Gaming, Collaboration (WebSockets).
• API Servers: High concurrency with non-blocking I/O.
• Tooling: The foundation of modern frontend toolchains (Vite, Next.js).

Quick Start (Native Features)

// Native Test Runner (No Jest needed)
import { test, assert } from "node:test";

test("synchronous passing test", (t) => {
  assert.strictEqual(1, 1);
});